I have a '79 100hp Johnson. I read in my manual and on the board that I should be idling in the 650 range in gear and closer to1000 out of gear. As it stands right now my motor is idling at the same rpm's whether it's in gear or neutral...in other words if the throttle cable is adjusted to idle at 1500 rpm's when I shift into forward the rps don't drop or change...if the throttle cable is set to idle at 650 in neutral it stays at 650 when I shift into forward as well. All of this is done while the motor is on the muffs....is this right or should the rpm's be dropping when I shift into gear?